Cooking oven



FIG. 1 is a front, right, top perspective view of a cooking oven inaccordance with our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a back elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a left side elevation view thereof; and,

FIG. 8 is front, right, top perspective view of the cooking oven withdoor open.

CLAIM The ornamental design for a cooking oven, as shown and described.